Six Graduated Bite Tubes, a set of tools, are designed to teach jaw closure to kids who are unable to freely close their jaw for chewing or creating sounds when speaking. When dealing with kids with cerebral palsy or traumatic brain injury, this difficulty is frequently understood. They are able to shift their mouth postures from shut to fully open, but they are unable to reverse the process. It is extremely helpful when working with children who are unable to drink with a straw in the area of feeding. It is recommended to children who omit closest consonants as they are incapable to willingly lift their jaws so they can work on their speech sound production.